Crystal Organic Light-Emitting Diodes with Perfectly Oriented Non-Doped Pt-Based Emitting Layer

Kwon-Hyeon Kim; Jia-Ling Liao; Si Woo Lee; Bomi Sim; Chang-Ki Moon; Gene-Hsiang Lee; Hyo Jung Kim; Yun Chi; Jang-Joo Kim

doi:10.1002/adma.201504451

Crystal Organic Light-Emitting Diodes with Perfectly Oriented Non-Doped Pt-Based Emitting Layer

Adv Mater. 2016 Apr 6;28(13):2526-32. doi: 10.1002/adma.201504451. Epub 2016 Feb 2.

Authors

Kwon-Hyeon Kim¹, Jia-Ling Liao², Si Woo Lee³, Bomi Sim¹, Chang-Ki Moon¹, Gene-Hsiang Lee⁴, Hyo Jung Kim³, Yun Chi², Jang-Joo Kim¹

Affiliations

¹ WCU Hybrid Materials Program, Department of Materials Science and Engineering and the Center for Organic Light Emitting Diode, Seoul National University, Seoul, 151-742, South Korea.
² Department of Chemistry and Low Carbon Energy Research Center, National Tsing Hua University, Hsinchu, 30013, Taiwan.
³ Department of Organic Material Science and Engineering, Pusan National University, Busan, 609-755, Korea.
⁴ Instrumentation Center, National Taiwan University, Taipei, 10617, Taiwan.

PMID: 26833629
DOI: 10.1002/adma.201504451

Abstract

Organic light-emitting diodes with external quantum efficiency of 38.8% are realized using a Pt-based thin-film emitting layer with photoluminescence quantum yield of 96% and transition dipole ratio of 93%. The emitting dipole orientation of the thin films fabricated using Pt complexes is investigated and the structural relationship between X-ray structural analysis and the structures in thin films are discussed based on quantum chemical calculations.

Keywords: oriented crystals; phosphorescent OLEDs; platinum complexes.